3v4l.org

run code in 300+ PHP versions simultaneously
<?php class TestAttribute {} class NestedAttribute {} #[TestAttribute(new \NestedAttribute())] class A {}
Output for 7.4.0 - 7.4.27, 8.1.0 - 8.1.33, 8.2.22 - 8.2.29, 8.3.5 - 8.3.27, 8.4.1 - 8.4.14
Output for 8.0.1 - 8.0.15
Fatal error: Constant expression contains invalid operations in /in/buKfZ on line 7
Process exited with code 255.
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79.82 ms | 407 KiB | 5 Q